Key lessons:
The Alzette river restoration project aimed at erasing the effect of the river chanelling, which caused the river uniformisation and an ecological impoverishment.
The project consisted in a remeandering, increase of the base level of the river, widening of the riverbed, reconnection of the river to existing ponds and creation of a new pond. The project contributed to restore the flood plain, to prevent flooding and erosion, to restore the natural functionning of the river, to improve the self purification capacity, to improve biodiversity and to intergrate the river in the natural landscape.